using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using System.IO;
using FastReport.Utils;

namespace FastReport
{
    /// <summary>
    /// Represents a collection of sort conditions used in the <see cref="DataBand.Sort"/>.
    /// </summary>
    public class SortCollection : CollectionBase, IFRSerializable
    {
        /// <summary>
        /// Gets or sets the element at the specified index.
        /// </summary>
        /// <param name="index">Index of an element.</param>
        /// <returns>The element at the specified index.</returns>
        public Sort this[int index]
        {
            get { return List[index] as Sort; }
            set { List[index] = value; }
        }

        /// <summary>
        /// Adds the specified elements to the end of this collection.
        /// </summary>
        /// <param name="range"></param>
        public void AddRange(Sort[] range)
        {
            foreach (Sort s in range)
            {
                Add(s);
            }
        }

        /// <summary>
        /// Adds an object to the end of this collection.
        /// </summary>
        /// <param name="value">Object to add.</param>
        /// <returns>Index of the added object.</returns>
        public int Add(Sort value)
        {
            return List.Add(value);
        }

        /// <summary>
        /// Inserts an object into this collection at the specified index.
        /// </summary>
        /// <param name="index">The zero-based index at which value should be inserted.</param>
        /// <param name="value">The object to insert.</param>
        public void Insert(int index, Sort value)
        {
            List.Insert(index, value);
        }

        /// <summary>
        /// Removes the specified object from the collection.
        /// </summary>
        /// <param name="value">Object to remove.</param>
        public void Remove(Sort value)
        {
            int i = IndexOf(value);
            if (i != -1)
                List.RemoveAt(i);
        }

        /// <summary>
        /// Returns the zero-based index of the first occurrence of an object.
        /// </summary>
        /// <param name="value">The object to locate in the collection.</param>
        /// <returns>The zero-based index of the first occurrence of value within the entire collection, if found; 
        /// otherwise, -1.</returns>
        public int IndexOf(Sort value)
        {
            return List.IndexOf(value);
        }

        /// <summary>
        /// Determines whether an element is in the collection.
        /// </summary>
        /// <param name="value">The object to locate in the collection.</param>
        /// <returns><b>true</b> if object is found in the collection; otherwise, <b>false</b>.</returns>
        public bool Contains(Sort value)
        {
            return IndexOf(value) != -1;
        }

        /// <inheritdoc/>
        public void Serialize(FRWriter writer)
        {
            writer.ItemName = "Sort";
            foreach (Sort s in this)
            {
                writer.Write(s);
            }
        }

        /// <inheritdoc/>
        public void Deserialize(FRReader reader)
        {
            Clear();
            while (reader.NextItem())
            {
                Sort s = new Sort();
                reader.Read(s);
                Add(s);
            }
        }

        /// <summary>
        /// Assigns values from another collection.
        /// </summary>
        /// <param name="source">Collection to assign from.</param>
        public void Assign(SortCollection source)
        {
            Clear();

            foreach (Sort sort in source)
            {
                Add(sort);
            }
        }
    }
}
